Sensor of a heart rate belt



FIG. 1 is a top, rear perspective view of a sensor of a heart rate belt.

FIG. 2 is a front perspective view of the sensor of FIG. 1; and,

FIG. 3 is a rear perspective view of the sensor of FIG. 1.

The broken lines shown in FIG. 1 are included for the purpose of illustrating environmental elements and form no part of the claimed design. The dash-dot lines in FIGS. 1 through 3 at the ends of the claimed portions of the sensor of a heart rate belt define the boundaries of the claim. 

We claim the ornamental design for a sensor of a heart rate belt, as shown and described. 